I can not remember ever reading a post by a Mudcat member supporting or justifying either the BNP or Loyalist paramilitaries or sectarian violence.
Individual acts of violence in NI do not usually generate posts on this forum.
The McCartney murder itself did not.
The thread you refer to was a debate between those who were appalled that officials from a respectable democratic party were involved in destroying eveicence and intimidating witnesses and the bereaved, and those who were not.